Monsanto Co's corn variety genetically engineered for drought tolerance is safe to use and is risk-free, the USDA said Thursday (Dec 22), giving clearance for sale.

The corn variety, known as MON 87460, "is no longer considered a regulated article under our regulations governing the introduction of certain genetically engineered organisms," announced USDA.

Monsanto petitioned USDA in February 2009 for approval of the drought-tolerant variety. It said, "Data suggest that MON 87460 reduces yield loss, primarily through increased kernel number per ear, under water-limited conditions by minimising the effect of water limitation on photosynthesis, stomatal conductance, and carbon fixation."